Background: Evaluation of hyperthermic intraperitoneal chemotherapy (HIPEC) in reducing metachronous peritoneal metastases (MPM) risks in patients with resectable serosa-invasive gastric cancer.
Materials & Methods: Between 2008 and 2016, 154 patients with gastric cancer (stage IIB-IIIC) were randomly assigned to two groups: 76 patients underwent HIPEC (cisplatin 50 mg/m + doxorubicin 50 mg/m, 42 °C, 1 h) combined with radical surgery (HIPEC group) and 78 patients underwent only radical surgery (control group).
Results: Evaluation of HIPEC toxicity showed neither toxic complications of IV-V degree nor haematological toxicity (according to CTCAE v. 4.03). There was no significant difference in the rate of complications between the two groups (p = 0.254). There was a more frequent disease progression in the control group than in the HIPEC group: 42/55 patients (76.4%) vs. 36/68 patients (52.9%), respectively (p = 0.009). At the same time a significant decrease in the rate of MPM was observed after HIPEC administration as compared with surgery alone - 16/68 (12.8%) vs. 39/55 (27.6%) (p < 0.001). 3-year progression-free survival was 47% (95% CI 36-61)) in the HIPEC group and 27% (95% CI 17-43) in the control group - p = 0.0024. The N-stage, HIPEC procedure, type of surgery and interaction between HIPEC treatment and age were independent prognostic factors.
Conclusions: HIPEC appears to be helpful in improving treatment results in radically operated gastric cancer patients.
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